Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZMB callsign genealogy
Currently held by MOODY, DONALD J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4ZMB's current licensee, walking backwards.
- Kalmanson, Marc HFLgranted 2007-09-18cancelled 2010-03-13
Successor callsigns
Callsigns held now by people who previously held K4ZMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZMB, oldest first.
- MOODY, DONALD J FL1988-02-16 → cancelled 2000-02-17
- Kalmanson, Marc H FL2020-03-10 active